Translating a booklet about WWI and came across this description from the author about the new recruits taking the oath to their King (please bear with us if this is a bit long):
I also took the oath when the chief rabbi was binding with the oath his co-believers to loyalty and devotion to their Serbian King and Serbian homeland. They took a separate oath, which left a very pleasant impression on all present Jews, including those from the other side of the Danube and Sava [rivers, the border between Serbia and Austria-Hungary, translator’s note]. I think that I did not do wrong, because when they are willing and able to die for my homeland, why wouldn’t I take the oath with them.
The Jewish chief rabbi said the following to his own: “According to the Talmud God forgives all sins and that for only the sin of oathbreaking he has no mercy. He further said that God does not forgive the descendants of oathbreakers as well. Go now and carry the Serbian flag there where our Serbian King orders you to and be proud to be the soldiers of the proud and mighty homeland of the Serb.” The now oath-bound soldiers of Moses’ faith cried out: Long live the King! Long live Serbia!
1) would it have been seen as inappropriate for a non-Jew to take the oath with the Jewish recruits? This was an onlooker, who also took the oath when the Orthodox Christians were taking theirs,
2) Is/was the Talmudic interpretation conveyed correctly by the onlooker or is there something that the chief rabbi in question would have added that the onlooker missed out on?